Objective To observe the sound attenuation effect of several kinds of hearing protectors (earplugs and earmuffs) in an infrasound generator sound field.
目的观察几种护耳器 (耳塞、耳罩 )对次声发生器次声场的隔声效果。
Comparing the Sound Reduction Attenuation of Three Types of Earmuffs with REAT Method;
结果 国内与国外耳罩声衰减值从 0 。
Most of active headsets, which use fixed analog feedback controllers, are not able to maximize the noise reduction.
目前有源耳罩大都采用固定的模拟反馈控制器,不能够最大限度地消除低频噪声。
In this paper, the characteristics, development and the state of the art of the active headset are discussed, and then the structure, algorithm and engineering implementation for analogue and digital active headset are investigated respectively.
有源耳罩作为有源噪声控制技术一个重要的应用方向,已经取得了许多的成果。
Based on this circuit,circuit system for the adaptive active noise canceling earmuff is designed.
简单介绍了AdμC812芯片的主要特点及结构原理,并以此为核心,设计出自适应有源抗噪耳罩电路系统,该系统具有体积小、功耗低,可完全置于耳罩内部,具有较大的实用价值。
It introduced in this paper that Introduc?the therapy of adhesive piaster sticking onto auricular points and the application of biological ear muff.
本文介绍了耳穴贴膏疗法和生物耳罩,前者是根据辩证将贴膏粘贴到相应耳穴上, 成年人用香桂活血膏较好,少年儿童用消炎解痛膏较好,其他膏药亦可。
Either of a pair of ear-coverings connected by a band across the top of the head, and worn to protect the ears, esp from the cold
（尤指防寒用的）耳罩
She could not bring herself to purchase even an inexpensive set of earmuffs made of mink.
但她不会买一件即使是由貂毛制作而成的便宜的御寒耳罩。
Any attempts to gain a competitive advantage by removing the safety glasses or ear protectors after the course of fire has commenced shall be considered unsportsmanlike conduct .
比赛开始后任何欲以移除护目镜或耳罩来获得竞争优势的企图将被视为没有运动家精神的举动。
And cupping his paws around his mouth, he whispered to the loppy eared rabbit next to him.
他将爪子罩在嘴上，对身边的垂耳兔悄悄耳语。
" Boots for self-locking nuts, singlelug, anchor"
GB/T939-1988单耳托板自锁螺母保护罩
" Boots for self-locking nuts,twolug, anchor"
GB/T940-1988双耳托板自锁螺母保护罩
The PLC control system development of mask and ear ribbon welding machine
口罩耳带熔接机PLC控制系统的开发
A new type design of welding worktable for cone-shaped mask and belt
一种新型锥形口罩耳带焊接工作台的设计
Safety requirement: Hardhats, Safety Glasses, Dust Mask, Face Shield, Ear Muff, and etc.
必须佩戴下列个人防护用品：安全帽、安全眼镜、面罩、防尘面罩、护耳器等.
Personal Protective Equipment such as eyewear, ear-plugs and face masks should be made available to employees when applicable.
当情况需要时,需提供个人防护设备如:眼罩,耳塞,面具等.
The Study of the Successively Produce of Cone-Shaped Non-Woven Fabrics Mask and the Ultrasonic Auto-Welding with the Belt;
无纺布锥形口罩本体连续生产及耳带超声波自动焊接的研究
cover ,tea pot (cosies), of textile materials
茶壶罩（保暖罩）纺织品制
The cowling on an aircraft.
整流罩飞机的引擎外罩
To enclose in or as if in a corset.
罩衣使…罩在或好象罩在紧身内衣里
Ears, ears, touch your ears.
耳朵，耳朵，摸摸你的耳朵。
To cover with or as if with a cowl.
（似乎）在…上装帽（罩）
She raised / lowered her veil.
她撩起[放下]面罩.
A person wearing a mask.
带面具（面罩）的人